Stress Dilatancy of Natural Soft Clay under an Undrained Creep Condition

AbstractThe stress–dilatancy relationship is a key point to capture the evolution of both strains and excess pore pressure during an undrained creep of natural soft clay. This paper focuses on investigating the stress dilatancy of natural soft clay during an undrained creep. Undrained triaxial creep...

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Veröffentlicht in:International journal of geomechanics 2015-10, Vol.15 (5)
Hauptverfasser: Wang, Li-Zhong, Yin, Zhen-Yu
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description AbstractThe stress–dilatancy relationship is a key point to capture the evolution of both strains and excess pore pressure during an undrained creep of natural soft clay. This paper focuses on investigating the stress dilatancy of natural soft clay during an undrained creep. Undrained triaxial creep tests are performed on K0-consolidated and isotropically consolidated samples of a typical Chinese soft marine clay with different stress levels. A unique stress–dilatancy curve is obtained from all test results. Several typical stress–dilatancy relations for soils are discussed, comparing them with experimental results. A common modification method for the stress dilatancy of sand is adopted and discussed for clay. All comparisons demonstrate that modified dilatancy equations can describe the stress–dilatancy relationship during an undrained creep. The modified dilatancy equation with the inclination of a potential surface seems to better describe the whole trend, and is suitable for natural soft clay.
doi_str_mv 10.1061/(ASCE)GM.1943-5622.0000271
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This paper focuses on investigating the stress dilatancy of natural soft clay during an undrained creep. Undrained triaxial creep tests are performed on K0-consolidated and isotropically consolidated samples of a typical Chinese soft marine clay with different stress levels. A unique stress–dilatancy curve is obtained from all test results. Several typical stress–dilatancy relations for soils are discussed, comparing them with experimental results. A common modification method for the stress dilatancy of sand is adopted and discussed for clay. All comparisons demonstrate that modified dilatancy equations can describe the stress–dilatancy relationship during an undrained creep. The modified dilatancy equation with the inclination of a potential surface seems to better describe the whole trend, and is suitable for natural soft clay.</abstract><pub>American Society of Civil Engineers</pub><doi>10.1061/(ASCE)GM.1943-5622.0000271</doi><oa>free_for_read</oa></addata></record>
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source American Society of Civil Engineers:NESLI2:Journals:2014
subjects Clay (material)
Consolidation
Creep (materials)
Engineering Sciences
Evolution
Inclination
Materials
Mathematical analysis
Mechanics
Sand
Soft clay
Soil stresses
Soils
Stresses
Technical Papers
title Stress Dilatancy of Natural Soft Clay under an Undrained Creep Condition
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